PWM with pic16f716...need help!!!

void main ( void ) {

    /* Configure timer0 and INT interrupts. */
    OPTION = 0xCF; /* Source = Fosc/4, 256:1 pre-scaler, RB0 rising edge interrupt. */
    T0IF = 0;      /* Clear any pending timer interrupt. */
    T0IE = 1;      /* Enable timer 0 interrupts. */

    INTF = 0;      /* Clear any pending external interrupt. */    
    INTE = 1;      /* Enable external (RB0) interrupt. */

    ei();          /* Global interrupt enable. */

    /* Wait for interrupt. */
    for{;;} {
        CLRWDT(); /* Clear watchdog timer. */
    }
}


void interrupt my_int_handler( void ) {

    if( T0IE && T0IF ) {
        /* Handle timer 0 overflow */
        T0IF = 0;
    }

    if( INTE && INTF ) {
        /* Handle INT interrupt */
        INTF = 0;
    }
}